Daily Sunspot Evaluation
Observation Sheet Friday, 10 May 1957
There is no typed record for this day. The values below were read by computer from the table on the sheet; when in doubt, see the drawing. Details →
- Number of groups (g)
- 8
- Number of spots (f)
- 90
- Relative number (R)
- 170
- Observer
- MH
- Reading
- all checks consistent
- File
- 19570510.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | F – 44 | 13 | 15E | ||||
| 2 | ? – 1 | 22 | 70E | ||||
| 3 | ? – 1 | 20 | 80E | ||||
| 4 | F – 38 | -27 | 9E | ||||
| 5 | A – 1 | -21 | 17W | ||||
| 6 | B – 3 | -18 | 16W | ||||
| 7 | ? – 1 | -29 | 80W | ||||
| 8 | A – 1 | 14 | 29W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.